257944264511 has 4 divisors (see below), whose sum is σ = 257946054912. Its totient is φ = 257942474112.

The previous prime is 257944264481. The next prime is 257944264531. The reversal of 257944264511 is 115462449752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 257944264511 - 2¹⁰ = 257944263487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 257944264511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257944264531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 658175 + ... + 974208.

It is an arithmetic number, because the mean of its divisors is an integer number (64486513728).

Almost surely, 2^257944264511 is an apocalyptic number.

257944264511 is a deficient number, since it is larger than the sum of its proper divisors (1790401).

257944264511 is a wasteful number, since it uses less digits than its factorization.

257944264511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790400.

The product of its digits is 2419200, while the sum is 50.

The spelling of 257944264511 in words is "two hundred fifty-seven billion, nine hundred forty-four million, two hundred sixty-four thousand, five hundred eleven".